Abstract

To suppress the fluctuation effect due to laser power instability and terahertz radiation fluctuation, a homomorphic filtering method is proposed to process the terahertz images obtained from a pulsed terahertz raster scanning imaging system. The physical model of homomorphic filtering for terahertz imaging is established. The mathematical expressions are given with the specific physical meaning in accordance with the imaging principle. To demonstrate the effectiveness of the method, a homomorphic filtering experiment based on two raw terahertz images selected from the literature using a continuous-wave (CW) terahertz source is also performed. The effect of the method is compared with those described in the literature, and the advantages of homomorphic filtering are discussed. The pulsed- and CW-terahertz image processing results both show that in addition to suppressing the fluctuation effect, the method can also enhance target imaging.

© 2013 Chinese Optics Letters

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  2. D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).
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2011 (1)

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

2010 (3)

P. Gorgel, A. Sertbas, and O. N. Ucan, J. Med. Syst. 34, 993 (2010).

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

S. Ding, Q. Li, R. Yao, and Q. Wang, Appl. Opt. 49, 6834 (2010).

2008 (2)

J. Yang, S. Yuan, and M. Zhang, Chin. Opt. Lett. 6, 29 (2008).

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

2003 (2)

S. C. Park, M. K. Park, and M. G. Kang, IEEE Signal Proc. Mag. 20, 21 (2003).

M. K. Ng and N. K. Bose, IEEE Signal Proc. Mag. 20, 62 (2003).

2002 (1)

X. Zhang, Phy. Med. Biol. 47, 3667 (2002).

2000 (3)

Z. Jiang, X. Xu, and X. Zhang, Appl. Opt. 39, 2982 (2000).

H. H. Arsenault and D. Lefebvre, Opt. Lett. 25, 1567 (2000).

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

1999 (1)

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

1998 (1)

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

1997 (1)

M. Elad and A. Feuer, IEEE Trans. Image Processing 6, 1646 (1997).

1996 (1)

D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

1995 (1)

Abbott, D.

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

Armstrong, E. E.

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

Arsenault, H. H.

Baraniuk, R. G.

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

Barnard, K. J.

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

Bognar, J. G.

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

Bose, N. K.

M. K. Ng and N. K. Bose, IEEE Signal Proc. Mag. 20, 62 (2003).

Chen, Z.

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

Deng, J.

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

Ding, S.

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

S. Ding, Q. Li, R. Yao, and Q. Wang, Appl. Opt. 49, 6834 (2010).

Doorn, T. van

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

Elad, M.

M. Elad and A. Feuer, IEEE Trans. Image Processing 6, 1646 (1997).

Feuer, A.

M. Elad and A. Feuer, IEEE Trans. Image Processing 6, 1646 (1997).

Gorgel, P.

P. Gorgel, A. Sertbas, and O. N. Ucan, J. Med. Syst. 34, 993 (2010).

Gupta, M.

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

Hardie, R. C.

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

Hu, B. B.

Jiang, Z.

Jocobsen, R. H.

D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

Kang, K.

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

Kang, M. G.

S. C. Park, M. K. Park, and M. G. Kang, IEEE Signal Proc. Mag. 20, 21 (2003).

Karpowicz, N.

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

Koch, M.

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

Lefebvre, D.

Li, Q.

S. Ding, Q. Li, R. Yao, and Q. Wang, Appl. Opt. 49, 6834 (2010).

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

Mickan, S.

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

Mittleman, D. M.

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

Munch, J.

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

Neelamani, R.

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

Ng, M. K.

M. K. Ng and N. K. Bose, IEEE Signal Proc. Mag. 20, 62 (2003).

Nuss, M. C.

D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

B. B. Hu and M. C. Nuss, Opt. Lett. 20, 1716 (1995).

Park, M. K.

S. C. Park, M. K. Park, and M. G. Kang, IEEE Signal Proc. Mag. 20, 21 (2003).

Park, S. C.

S. C. Park, M. K. Park, and M. G. Kang, IEEE Signal Proc. Mag. 20, 21 (2003).

Rudd, J. V.

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

Sertbas, A.

P. Gorgel, A. Sertbas, and O. N. Ucan, J. Med. Syst. 34, 993 (2010).

Ucan, O. N.

P. Gorgel, A. Sertbas, and O. N. Ucan, J. Med. Syst. 34, 993 (2010).

Wang, Q.

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

S. Ding, Q. Li, R. Yao, and Q. Wang, Appl. Opt. 49, 6834 (2010).

Wang, Y.

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

Watson, E. A.

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

Xu, X.

Yang, J.

Yao, R.

S. Ding, Q. Li, R. Yao, and Q. Wang, Appl. Opt. 49, 6834 (2010).

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

Yin, Q.

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

Yuan, S.

Zhang, C.

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

Zhang, L.

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

Zhang, M.

Zhang, X.

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

X. Zhang, Phy. Med. Biol. 47, 3667 (2002).

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

Z. Jiang, X. Xu, and X. Zhang, Appl. Opt. 39, 2982 (2000).

Zhao, Y.

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

Zhao, Z.

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

Appl. Opt. (2)

Appl. Phys. B (1)

D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

Chin. Opt. Lett. (1)

IEEE J. Sel. Top. Quantum Electron. (1)

D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

IEEE Signal Proc. Mag. (2)

S. C. Park, M. K. Park, and M. G. Kang, IEEE Signal Proc. Mag. 20, 21 (2003).

M. K. Ng and N. K. Bose, IEEE Signal Proc. Mag. 20, 62 (2003).

IEEE Trans. Image Processing (1)

M. Elad and A. Feuer, IEEE Trans. Image Processing 6, 1646 (1997).

J. Infrared Millim. Waves (1)

Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

J. Med. Syst. (1)

P. Gorgel, A. Sertbas, and O. N. Ucan, J. Med. Syst. 34, 993 (2010).

Microelectron. J. (1)

S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

Opt. Commun. (1)

L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

Opt. Eng. (2)

R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

Opt. Lett. (2)

Phy. Med. Biol. (1)

X. Zhang, Phy. Med. Biol. 47, 3667 (2002).

Other (3)

L. Xu, Digital Image Processing (in Chinese) (Science Press, Beijing, 2007).

R. C. Gonzalez and R. E. Woods, Digital Image Processing (Publishing House of Electronics Industry, Beijing, 2007).

V. Jellus, W. Horger, and B. Kiefer, Magnetom Flash, 180, www.siemens.com/magnetom-world (2009).

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